Build Your First Robot Car using #arduinouno | Step-by-Step Guide 🛠️#roboticsengineering #robotics

Build Your First Robot Car using #arduinouno | Step-by-Step Guide 🛠️#roboticsengineering #robotics #diy #Robotics #roboticsengineering #roboticsfuture #digitaltechtutor

In this project, we will create a Bluetooth-controlled robotic car using the following components:

🔹 Arduino Uno R3 🎛️ – The brain of our robot, responsible for processing commands.
🔹 Motor Driver L293D ⚙️ – Controls the speed and direction of the DC motors.
🔹 Bluetooth Module HC-05 📡 – Allows wireless communication between the robot and a smartphone.
🔹 DC Gear Motors (2 or 4) 🚗 – Provides movement for the robot.
🔹 12V Battery / Power Source 🔋 – Supplies power to the circuit.

📜 How It Works:
1️⃣ The HC-05 Bluetooth module connects to a mobile app via Bluetooth. 📲
2️⃣ The Arduino Uno R3 receives commands from the mobile app via serial communication. 🔄
3️⃣ The L293D motor driver processes signals from Arduino and controls the motors' movement. ⚡
4️⃣ The DC motors respond to the commands, allowing the robot to move forward, backward, left, or right. 🚙💨

🔗 Circuit Connections:
✅ HC-05 Bluetooth Module

VCC → 5V (Arduino)
GND → GND
TX → RX (Arduino)
RX → TX (Arduino)
✅ L293D Motor Driver

Input 1, Input 2, Input 3, Input 4 → Connected to Arduino Digital Pins
Motor Output Pins → Connected to DC motors
VCC → 5V
GND → Common Ground
Enable Pins → HIGH for activation
✅ DC Motors

Connected to the L293D Motor Driver Outputs
✅ Power Supply

12V Battery → Connects to L293D & Arduino
🛠️ Programming (Arduino Code)
You’ll need the Arduino IDE to upload the code. The program will receive Bluetooth commands (e.g., 'F' for Forward, 'B' for Backward) and control motor movements accordingly.

cpp
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#include SoftwareSerial.h

SoftwareSerial BT(10, 11); // RX, TX for Bluetooth module

int motor1A = 3;
int motor1B = 4;
int motor2A = 5;
int motor2B = 6;

void setup() {
pinMode(motor1A, OUTPUT);
pinMode(motor1B, OUTPUT);
pinMode(motor2A, OUTPUT);
pinMode(motor2B, OUTPUT);

BT.begin(9600); // Bluetooth HC-05 default baud rate
Serial.begin(9600);
}

void loop() {
if (BT.available()) {
char command = BT.read();
Serial.println(command);

if (command == 'F') { // Forward
digitalWrite(motor1A, HIGH);
digitalWrite(motor1B, LOW);
digitalWrite(motor2A, HIGH);
digitalWrite(motor2B, LOW);
}
else if (command == 'B') { // Backward
digitalWrite(motor1A, LOW);
digitalWrite(motor1B, HIGH);
digitalWrite(motor2A, LOW);
digitalWrite(motor2B, HIGH);
}
else if (command == 'L') { // Left
digitalWrite(motor1A, LOW);
digitalWrite(motor1B, HIGH);
digitalWrite(motor2A, HIGH);
digitalWrite(motor2B, LOW);
}
else if (command == 'R') { // Right
digitalWrite(motor1A, HIGH);
digitalWrite(motor1B, LOW);
digitalWrite(motor2A, LOW);
digitalWrite(motor2B, HIGH);
}
else if (command == 'S') { // Stop
digitalWrite(motor1A, LOW);
digitalWrite(motor1B, LOW);
digitalWrite(motor2A, LOW);
digitalWrite(motor2B, LOW);
}
}
}
📌 Final Steps:
✅ Upload the Arduino code to your Arduino Uno R3.
✅ Use a Bluetooth control app (e.g., Arduino Bluetooth Controller) to send movement commands. 📲
✅ Power up your robot and watch it move wirelessly! 🚀🎮

Let me know if you need any modifications or additional features! 😊

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